jordan
What do you mean by DC dimming on your phone? Is that a device setting, app, or just turning the brightness up?
I saw a clear 60Hz backlight flicker on another LG UHD 60Hz monitor with the Thorlabs detector that is not noticeable at lower gain settings. The flicker depth but not frequency increased as I adjusted the brightness.
Seagull mentioned how dithering affects inversion flicker making the combined result more comfortable and there was an Apple patent on using dithering to manage screen artifacts. So the concept of "masking" makes sense to me.